Dear Kumar Gala,
In message FC7A4DAE-B05C-49F3-9201-1B5BB559FF47@kernel.crashing.org you wrote:
Do you know if this board has any real reset on a FPGA or CPLD or something like that.
There is no such faeature on that board, nor on any of a number of other 85xx boards I have access to.
The problem on the 8555/8541 is the reset you are trigger is just a core reset and not one of the full SoC. If there is a board level means I would suggest trying to utilize it instead. If not this might be painful & problematic as you'll have to slowly make sure we are 'resetting' each SoC block properly.
Is this also the cause why the Linux reboot ommand does not work?
If so, I wonder what has changed, because this used to be working in older versions of the kernel? I did not attampt a full git bisect, but from some old images I still found it appears it must have been broken between 2.6.16 ("reboot" in Linux works fine) and 2.6.27 ("reboot" does not work any more) - so probably this was part of the arch/ppc => arch/powerpc rework.
Is there any specific reason we don't use the good old approach of triggering an unhandled machine check exception?
Best regards,
Wolfgang Denk